33 lines
823 B
C
33 lines
823 B
C
/*
|
|
|
|
@deftypefn Supplemental void* memchr (const void *@var{s}, int @var{c}, @
|
|
size_t @var{n})
|
|
|
|
This function searches memory starting at @code{*@var{s}} for the
|
|
character @var{c}. The search only ends with the first occurrence of
|
|
@var{c}, or after @var{length} characters; in particular, a null
|
|
character does not terminate the search. If the character @var{c} is
|
|
found within @var{length} characters of @code{*@var{s}}, a pointer
|
|
to the character is returned. If @var{c} is not found, then @code{NULL} is
|
|
returned.
|
|
|
|
@end deftypefn
|
|
|
|
*/
|
|
|
|
#include <ansidecl.h>
|
|
#include <stddef.h>
|
|
|
|
void *
|
|
memchr (register const void *src_void, int c, size_t length)
|
|
{
|
|
const unsigned char *src = (const unsigned char *)src_void;
|
|
|
|
while (length-- > 0)
|
|
{
|
|
if (*src == c)
|
|
return (void *)src;
|
|
src++;
|
|
}
|
|
return NULL;
|
|
}
|